Shape Maps

malloy can create area maps. By currently it uses US maps and state names.

The model and data styles for the subsequent examples is:

export define airports is (explore 'malloy-data.faa.airports'
  primary key code
  airport_count is count(*)
  by_state is (reduce
    state
    airport_count
  )
);

and data styles are

{
  "by_state": {
    "renderer": "shape_map"
  }
} 

Run as a simple query.

Run as a turtle.

explore airports 
| reduce 
  by_state

Run as a trellis.

explore airports 
| reduce
  faa_region
  airport_count, 
  by_state

Run as a trellis repeated filtered

explore airports 
| reduce
  faa_region
  airport_count, 
  by_state
  heliports is by_state : [fac_type :'HELIPORT']
  seaplane_bases is by_state : [fac_type :'SEAPLANE BASE']